| brain mushroom | |
noun | |
| a poisonous gyromitra; the surface of the fertile body is smooth at first and becomes progressively undulating and wrinkled (but never truly pitted); color varies from dull yellow to brown [syn: Gyromitra esculenta] |
| a fool or simpleton; ninny. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
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